ADM488ABRMZ

RS-485 线路驱动器和接收器，Analog Devices### RS-485 线路驱动器和接收器

GENERAL DESCRIPTION

The ADM488A and ADM489A are low power, differential line transceivers suitable for communication on multipoint bus transmission lines. They are intended for balanced data transmission and comply with both RS-485 and RS-422 standards of the Electronics Industries Association EIA. Both products contain a single differential line driver and a single differential line receiver, making them suitable for full-duplex data transfer. The ADM489A contains an additional receiver and driver enable control.

The input impedance is 12 kΩ, allowing 32 transceivers to be connected on the bus. The ADM488A/ADM489A operate from a single 5 V ± 10% power supply.

FEATURES

  Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987E

  250 kbps data rate

  Single 5 V ± 10% supply

  −7 V to +12 V bus common-mode range

  Connect up to 32 nodes on the bus

  Reduced slew rate for low EM interference

  Short-circuit protection

  30 μA supply current

APPLICATIONS

  Low power RS-485 and RS-422 systems

  DTE-DCE interface

  Packet switching

  Local area networks

  Data concentration

  Data multiplexers

  Integrated services digital network ISDN